Fever — Causes, Related Conditions & Affordable Treatment

About Fever

Fever is a common symptom, often signaling your body is fighting off an infection or illness. While it can be unsettling, recognizing the signs and knowing when to act is key. Fortunately, many effective and affordable treatment options are available to help you feel better, and we're here to ensure you get them without breaking the bank.

Understanding Fever: Your Body's Natural Defense

Fever, medically defined as an elevation in body temperature above the normal range (typically 98.6°F or 37°C), isn't an illness itself but rather a symptom. It's your body's sophisticated way of responding to a perceived threat, often an infection. When your immune system detects invaders like bacteria or viruses, it releases chemicals called pyrogens that signal the brain's hypothalamus (your body's thermostat) to raise your core temperature. This elevated temperature can make it harder for pathogens to thrive, while also boosting the activity of certain immune cells.

What Causes It?

The most common culprits behind a fever are infections, including viral illnesses like the common cold, flu, or COVID-19, and bacterial infections such as strep throat, pneumonia, or urinary tract infections. However, fever can also stem from inflammatory conditions (like rheumatoid arthritis), certain medications as a side effect, heat exhaustion, or even reactions to vaccinations. Pinpointing the cause is often crucial for effective treatment.

When to Seek Medical Attention

While most fevers resolve on their own with home care, there are specific situations where a doctor's visit is essential:

• Infants (0-3 months): Any fever (rectal temperature 100.4°F/38°C or higher) in this age group warrants immediate medical attention.
• Children (3 months to 3 years): See a doctor if the fever reaches 102.2°F (39°C) or higher, or if they show signs of severe discomfort, lethargy, stiff neck, rash, or difficulty breathing.
• Adults: Consult a doctor if your fever is 103°F (39.4°C) or higher, lasts more than three days, or is accompanied by severe headache, stiff neck, rash, confusion, difficulty breathing, persistent vomiting, abdominal pain, or seizures. Individuals with compromised immune systems or chronic conditions should also seek earlier medical advice.

Effective Treatment Options

Managing a fever primarily involves supporting your body's natural healing process and alleviating discomfort:

1. Rest: Allow your body to conserve energy and focus on fighting the infection. 2. Hydration: Drink plenty of fluids like water, clear broths, and electrolyte solutions to prevent dehydration, especially since fever can lead to increased fluid loss. 3. Over-the-Counter (OTC) Medications: Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are effective fever reducers and pain relievers. Always follow dosage instructions carefully. 4.

The information above is for educational purposes only and does not constitute medical advice. Consult your healthcare provider before making medication decisions.

MedlinePlus overview of Fever

A fever is a body temperature that is higher than normal. A normal temperature can vary from person to person, but it is usually around 98.6 °F (37 °C). A fever is not a disease. It is usually a sign that your body is trying to fight an illness or infection.

Infections cause most fevers. You get a fever because your body is trying to kill the virus or bacteria that caused the infection. Most of those bacteria and viruses do well when your body is at your normal temperature. But if you have a fever, it is harder for them to survive. Fever also activates your body's immune system.

Other causes of fevers include:

Medicines, including some antibiotics, blood pressure medicines, and anti-seizure medicines

Heat illness

Cancers

Autoimmune diseases

Some childhood vaccines

Treatment depends on the cause of your fever. If the fever is very high, your health care provider may recommend taking an over-the-counter medicine such as acetaminophen or ibuprofen. Adults can also take aspirin, but children with fevers should not take aspirin. It is also important to drink enough liquids, to prevent dehydration.

Source: MedlinePlus, National Library of Medicine. MedlinePlus topic page. Topic date: 01/05/2000. MedlinePlus file date: 10/15/2026 02:30:37.

This information is educational and is not medical advice.

Related symptoms

• Activity-Related Fever
• Acute Fever
• Age-Related Fever
• Allergy-Related Fever
• Chronic Fever
• Diabetic Fever
• Evening Fever
• Exercise-Induced Fever